<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
            <script>
           /*     (function () {
                    alert('haha')
                })()
                */
           +function(){
               alert('haha')
           }()
            </script>
</body>
</html>